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p9 bus emulation

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Aiden
2026-05-25 22:32:13 +10:00
parent c3eb09ddc8
commit 0c241877eb
12 changed files with 179 additions and 10 deletions
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36
tests/test_emulator_fast_paths.py
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@@ -1,6 +1,7 @@
import unittest
from h8536.emulator.fast_paths import (
LOC_BFE0_TRANSFER_WRAPPER,
LOC_C08B_P9_WRITE_BYTE,
LOC_C0DB_P9_READ_BYTE,
P9FastPath,
@@ -105,6 +106,41 @@ class P9FastPathTest(unittest.TestCase):
self.assertEqual(event.queue_depth, 1)
self.assertEqual(fast_path.trace_lines(), ["read_byte pc=C0DB value=00 source=script:idle-panel queued=1"])
def test_wrapper_defaults_to_timeout_when_no_p9_device_response_is_queued(self):
emulator = H8536Emulator(bytes(rom_with_reset()))
emulator.cpu.pc = LOC_BFE0_TRANSFER_WRAPPER
emulator.cpu.regs[7] = 0xFE84
emulator.memory.write16(0xFE84, 0x789A)
fast_path = P9FastPath(P9FastPathConfig(enabled=True))
self.assertTrue(fast_path.try_handle(emulator))
event = fast_path.events[-1]
self.assertEqual(event.kind, "wrapper_timeout")
self.assertFalse(event.success)
self.assertEqual(event.source, "default_timeout")
self.assertEqual(emulator.cpu.regs[0], 0)
self.assertTrue(emulator.cpu.z)
self.assertEqual(emulator.cpu.pc, 0x789A)
def test_wrapper_can_succeed_from_queued_p9_device_response(self):
emulator = H8536Emulator(bytes(rom_with_reset()))
emulator.cpu.pc = LOC_BFE0_TRANSFER_WRAPPER
emulator.cpu.regs[7] = 0xFE86
emulator.memory.write16(0xFE86, 0x89AB)
emulator.memory.p9_bus.queue_wrapper_results([True], source="panel-script")
fast_path = P9FastPath(P9FastPathConfig(enabled=True))
self.assertTrue(fast_path.try_handle(emulator))
event = fast_path.events[-1]
self.assertEqual(event.kind, "wrapper_success")
self.assertTrue(event.success)
self.assertEqual(event.source, "panel-script")
self.assertEqual(emulator.cpu.regs[0], 1)
self.assertFalse(emulator.cpu.z)
self.assertEqual(emulator.cpu.pc, 0x89AB)
if __name__ == "__main__":
unittest.main()